1. What is Price per Watt for Solar?

Definition: This metric calculates the cost of solar power systems relative to their power output, expressed in dollars per watt ($/W).

Purpose: It helps compare the cost-effectiveness of different solar installations and assess financial viability.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Total System Cost — Complete installed cost including panels, inverter, labor, etc.
• Total System Power — Combined wattage of all solar panels at standard test conditions

Explanation: Dividing total cost by total wattage gives the cost per unit of power capacity.

3. Importance of Price per Watt Calculation

Details: This metric is crucial for:

• Comparing quotes from different solar installers
• Evaluating system efficiency and value
• Budgeting and financial planning
• Assessing return on investment

4. Using the Calculator

Tips:

• Enter the total installed cost of your solar system in dollars
• Enter the total DC power rating in watts (sum of all panel ratings)
• Both values must be greater than zero

5. Frequently Asked Questions (FAQ)

Q1: What's a good price per watt for solar?
A: As of 2023, $2.50-$3.50/W is typical for residential systems, with commercial systems often lower.

Q2: Does this include tax credits or incentives?
A: Typically calculated before incentives for comparison purposes, but can be calculated both ways.

Q3: Should I use DC or AC wattage?
A> Standard practice is to use the DC rating (panel nameplate rating) for consistency.

Q4: How does system size affect price per watt?
A: Larger systems generally have lower $/W due to economies of scale.

Q5: What costs should be included?
A: Include all equipment, installation labor, permits, and any other direct costs.